When judgment bearing will use again, according to TIMKEN bearing damage, mechanical properties, the importance, the operating conditions, inspection cycle related factors to decide. But when I check if it is found in any of the following defects, bearings are not in use, new bearing needs to be replaced.
1, and lubrication conditions viscosity in scroll contact surface Zhijian formed a enough to two a surface separated of lubrication film, lubricant in normal work temperature Shi must maintained must of minimum viscosity to reduced bearing friction, high bearing life, rings of main factors for bearing average diameter and work speed effects. work viscosity lubricant in work temperature Xia of viscosity by work temperature T4 ℃ Shi of said viscosity by stuck temperature curve determines and viscosity than is a said oil film formed capacity of indicators, to it speed, factors on TIMKEN bearings life has is large effects , When running variations (temperature, speed reduction, and increase of) bearing life may be dirt, reducing.
Correction coefficient of 2, TIMKEN bearing life calculation and analysis of influence factors of correction coefficient calculation method. analysis of impact correction factor is an underlying factor of bearing life, TIMKEN better lubrication of bearings should be greater than or equal to the viscosity and are not too large, otherwise increase in viscosity may increase the operating temperature of the bearing. When using lubricants containing extreme pressure additives in addition surface pressure also changes viscosity of lubricating oils, are taken into account in the calculation methods of symbolic significance operating conditions (operating temperature speed load size effects of lubrication on bearing life is reproduced.
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